ZHCSE41C
August 2015 – May 2017
LP8861-Q1
PRODUCTION DATA.
1
特性
2
应用
系统效率
3
说明
简化原理图
4
修订历史记录
5
器件比较表
6
Pin Configuration and Functions
Pin Functions
7
Specifications
7.1
Absolute Maximum Ratings
7.2
ESD Ratings
7.3
Recommended Operating Conditions
7.4
Thermal Information
7.5
Electrical Characteristics
7.6
Internal LDO Electrical Characteristics
7.7
Protection Electrical Characteristics
7.8
Power Line FET Control Electrical Characteristics
7.9
Current Sinks Electrical Characteristics
7.10
PWM Brightness Control Electrical Characteristics
7.11
Boost/SEPIC Converter Characteristics
7.12
Logic Interface Characteristics
7.13
Typical Characteristics
8
Detailed Description
8.1
Overview
8.2
Functional Block Diagram
8.3
Feature Description
8.3.1
Integrated Boost/SEPIC Converter
8.3.2
Internal LDO
8.3.3
LED Current Sinks
8.3.3.1
Current Sink Configuration
8.3.3.2
Current Setting
8.3.3.3
Brightness Control
8.3.4
Power-Line FET Control
8.3.5
LED Current Dimming With External Temperature Sensor
8.3.6
Protection and Fault Detection
8.3.6.1
Adaptive Boost Control and Functionality of LED Fault Comparators
8.3.6.2
Overview of the Fault/Protection Schemes
8.4
Device Functional Modes
8.4.1
Device States
9
Application and Implementation
9.1
Application Information
9.2
Typical Applications
9.2.1
Typical Application for 4 LED Strings
9.2.1.1
Design Requirements
9.2.1.2
Detailed Design Procedure
9.2.1.2.1
Inductor Selection
9.2.1.2.2
Output Capacitor Selection
9.2.1.2.3
Input Capacitor Selection
9.2.1.2.4
LDO Output Capacitor
9.2.1.2.5
Diode
9.2.1.2.6
Power Line Transistor
9.2.1.2.7
Input Current Sense Resistor
9.2.1.3
Application Curves
9.2.2
High Output Current Application
9.2.2.1
Design Requirements
9.2.2.2
Detailed Design Procedure
9.2.2.3
Application Curves
9.2.3
SEPIC Mode Application
9.2.3.1
Design Requirements
9.2.3.2
Detailed Design Procedure
9.2.3.2.1
Diode
9.2.3.2.2
Inductor
9.2.3.3
Application Curves
9.2.4
Application with Temperature Based LED Current De-rating
9.2.4.1
Design Requirements
9.2.4.2
Detailed Design Procedure
9.2.4.3
Application Curve
10
Power Supply Recommendations
11
Layout
11.1
Layout Guidelines
11.2
Layout Example
12
器件和文档支持
12.1
器件支持
12.1.1
第三方产品免责声明
12.2
文档支持
12.2.1
相关文档
12.3
接收文档更新通知
12.4
社区资源
12.5
商标
12.6
静电放电警告
12.7
术语表
13
机械、封装和可订购信息
封装选项
机械数据 (封装 | 引脚)
PWP|20
MHTS001G
散热焊盘机械数据 (封装 | 引脚)
PWP|20
PPTD027Z
订购信息
zhcse41c_oa
zhcse41c_pm
1
特性
符合汽车应用要求 要求
具有符合 AECQ100 标准的下列结果:
器件温度 1 级:-40°C 至 +125°C 的环境运行温度范围
输入工作电压范围:4.5V 至 40V
四路高精度电流阱
电流匹配度为 1%(典型值)
LED 灯串电流高达 100mA/通道
100Hz 下的调光比为 10 000:1
用于 LED 灯串电源的集成升压/SEPIC 转换器
输出电压高达 45V
开关频率:300kHz 至 2.2MHz
开关同步输入
扩展频谱可降低电磁干扰 (EMI)
电力线场 FET 控制可实现浪涌电流保护和待机节能
丰富的故障检测和容错功能 特性
故障输出
输入电压过压保护 (OVP)、欠压锁定 (UVLO) 和过流保护 (OCP)
开路和短路 LED 故障检测
使用外部温度传感器自动降低 LED 电流
热关断
最大限度减少外部组件数